140CPU43412 140CPU43412 2 140CPU43412 3 140CPU43412 4

The Schneider Electric 140CPU43412C is a high‑performance processor module for the Modicon Quantum automation platform, designed to deliver robust industrial control and strong networking capabilities. Built around a proven 80486 architecture with ample onboard memory, this CPU provides reliable execution for medium‑to‑large automation programs and supports distributed I/O systems with multiple communication ports. Its rugged design ensures dependable performance in harsh manufacturing and process environments.

Technical Specifications

Specification	Details
Product Type	PLC CPU Processor Module
Platform	Modicon Quantum
Processor	80486 core
Clock Frequency	66 MHz
Internal Memory	~896 KB RAM
I/O Capacity	64 In / 64 Out (local/remote)
Distributed I/O Support	500 In / 500 Out per network
Max Remote Drops	Up to 31
Communication Ports	1 × Modbus Plus, 2 × Modbus RS‑232
Watchdog Timer	250 ms
Bus Current Requirement	~1250 mA
Operating Temperature	0 °C to 60 °C
Storage Temperature	-40 °C to 85 °C
Protection	Conformal coating option
Dimensions (H×W×D)	164 × 254 × 51 mm (approx.)
Weight	Approx. 0.60 kg (600 g)
Mounting	Standard Quantum rack

This module’s combination of memory and networking support makes it an effective choice for distributed control systems requiring scalable performance.

Recommended Related Models

140NOE77101 Ethernet Communication Module
140CRA93200 Remote I/O Adapter
140XBP01600 Backplane Rack
140CPS11410C AC Power Supply Module
140CPU11303C Compact CPU Module

Popular Schneider Electric PLC Modules

BMXP342020 Processor Module
BMXAMI0810 Analog Input Module
BMXDDI1602 Digital Input Module
BMXDDO1602 Digital Output Module
BMXNOC0401 Ethernet Communication Module

Application Scenarios

The 140CPU43412C is widely deployed in industrial environments that demand reliable processing and flexible I/O networking:

Manufacturing automation and assembly lines
Water/wastewater treatment and utility control
Packaging and material handling systems
Chemical and energy process control
Distributed I/O systems requiring Modbus communication

Key Advantages

Balanced Performance: The 80486 processor and ~896 KB RAM ensure reliable execution of complex control tasks.
Network Flexibility: Dual RS‑232 and Modbus Plus communication ports support flexible integration with distributed I/O and legacy networks.
Scalable I/O Support: Supports local and distributed I/O expansion with up to 31 remote drops.
Durable Design: Built for industrial environments with optional conformal coating for enhanced reliability.
Easy Integration: Compatible with established Quantum backplane systems and programming tools like Concept and ProWORX 32.

Technical FAQs

What processor is used in the 140CPU43412C?
It uses an 80486 core running at 66 MHz.
How much memory does it have?
The module features ~896 KB of internal RAM.
Which communication interfaces are available?
It includes one Modbus Plus port and two Modbus RS‑232 ports.
How many remote I/O drops can be supported?
Up to 31 remote drops.
What distributed I/O capacity does it support?
Up to 500 In / 500 Out per network.
What are the physical dimensions?
Approximately 164 mm × 254 mm × 51 mm.
What is the operational temperature range?
It operates from 0 °C to 60 °C.
Can this CPU be programmed with standard tools?
Yes, it is compatible with Quantum programming tools such as Concept and ProWORX 32.
Is this product still in production?
The 140CPU43412C is considered legacy and may be more commonly sourced as refurbished or surplus.
What makes this CPU a strong choice?
Its balanced memory, networking support, and expandable I/O capability make it suitable for robust distributed automation control.